// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef CONTENT_BROWSER_PERMISSIONS_PERMISSION_SERVICE_CONTEXT_H_
#define CONTENT_BROWSER_PERMISSIONS_PERMISSION_SERVICE_CONTEXT_H_

#include "base/macros.h"
#include "base/memory/scoped_vector.h"
#include "content/public/browser/permission_type.h"
#include "content/public/browser/web_contents_observer.h"
#include "mojo/public/cpp/bindings/interface_request.h"

namespace blink {
namespace mojom {
    class PermissionObserver;
    class PermissionService;
}
}

namespace url {
class Origin;
}

namespace content {

class PermissionServiceImpl;
class RenderFrameHost;
class RenderProcessHost;

// Provides information to a PermissionService. It is used by the
// PermissionServiceImpl to handle request permission UI.
// There is one PermissionServiceContext per RenderFrameHost/RenderProcessHost
// which owns it. It then owns all PermissionServiceImpl associated to their
// owner.
class PermissionServiceContext : public WebContentsObserver {
public:
    explicit PermissionServiceContext(RenderFrameHost* render_frame_host);
    explicit PermissionServiceContext(RenderProcessHost* render_process_host);
    ~PermissionServiceContext() override;

    void CreateService(
        mojo::InterfaceRequest<blink::mojom::PermissionService> request);

    void CreateSubscription(
        PermissionType permission_type,
        const url::Origin& origin,
        mojo::InterfacePtr<blink::mojom::PermissionObserver> observer);

    // Called by a PermissionServiceImpl identified as |service| when it has a
    // connection error in order to get unregistered and killed.
    void ServiceHadConnectionError(PermissionServiceImpl* service);

    // Called when the connection to a PermissionObserver has an error.
    void ObserverHadConnectionError(int subscription_id);

    BrowserContext* GetBrowserContext() const;
    GURL GetEmbeddingOrigin() const;

    RenderFrameHost* render_frame_host() const;

private:
    class PermissionSubscription;

    // WebContentsObserver
    void RenderFrameHostChanged(RenderFrameHost* old_host,
        RenderFrameHost* new_host) override;
    void FrameDeleted(RenderFrameHost* render_frame_host) override;
    void DidNavigateAnyFrame(RenderFrameHost* render_frame_host,
        const LoadCommittedDetails& details,
        const FrameNavigateParams& params) override;

    void CancelPendingOperations(RenderFrameHost*);

    RenderFrameHost* render_frame_host_;
    RenderProcessHost* render_process_host_;
    std::vector<std::unique_ptr<PermissionServiceImpl>> services_;
    std::unordered_map<int, std::unique_ptr<PermissionSubscription>>
        subscriptions_;

    DISALLOW_COPY_AND_ASSIGN(PermissionServiceContext);
};

} // namespace content

#endif // CONTENT_BROWSER_PERMISSIONS_PERMISSION_SERVICE_CONTEXT_H_
